Journal: Astronomy and Astrophysics

  • Publication
    On the variable spectrum of HD 45677 (FS Canis Majoris)
    { We have studied high-resolution optical spectra of the peculiar B[e] star HD 45677 (FS CMa) observed during 3 nights in October 1995. The main results of our...
  • Publication
    Opacity for realistic 3D MHD simulations of cool stellar atmospheres
    Context. Realistic three-dimensional time-dependent simulations of stellar near-surface convection employ the opacity binning method for the efficient and...
  • Publication
    Open cluster Dolidze 25: Stellar parameters and the metallicity in the Galactic anticentre
    Context. The young open cluster Dolidze 25, in the direction of the Galactic anticentre, has been attributed a very low metallicity, with typical abundances...
  • Publication
    Opening PANDORA's box: APEX observations of CO in PNe
    Context. Observations of molecular gas have played a key role in developing the current understanding of the late stages of stellar evolution. Aims: The survey...
  • Publication
    Optical analysis of the poor clusters Abell 610, Abell 725, and Abell 796, containing diffuse radio sources
    Aims: We study the dynamical status of the poor, low X-ray luminous galaxy clusters Abell 610, Abell 725, and Abell 796 (at z = 0.1, 0.09, and 0.16...
  • Publication
    Optical and EUV observations of solar flare kernels
    We present high-resolution spectral observations, covering the entire optical region (3800-9000 Å), of a solar flare observed during a multi-wavelength campaign...
  • Publication
    Optical and near-infrared follow-up observations of GRB980329
    We imaged the field of GRB980329 in the optical and in the near-infrared starting 20 hours after the event, at the ESO NTT, at the NOT, at the APO and at the...
  • Publication
    Optical and near-infrared polarization of the black hole X-ray binary A0620−00 in quiescence
    We present simultaneous high-precision optical polarimetric and near-infrared (NIR) to ultraviolet (UV) photometric observations of the low-mass black hole X...
  • Publication
    Optical and near-infrared spectroscopy of the black hole transient 4U 1543-47 during its 2021 ultra-luminous state
    We present simultaneous optical and near-infrared spectra obtained during the 2021 outburst of the black hole transient 4U 1543-47. The X-ray hardness-intensity...